Spring structure.



0. R. HUNT.

SPRING STRUCTURE.

APPL|cAT|o.N.mED APR.23.1918.

Patented 11111111919.

2 SHEETS- SHEET 1.

Nef...

Y o. B. HUNT. SPRING STRUCTURE.

APPLICATION FILED APH. 23,1918.

1 ,29 1,003. Patented Jan. 14, 1919.

2 SHEETS-SHEET 2.

1 the advantages of such prior structures may "provernents having lmore particularly, though not exclusively, in relatively smellI examples, the cushion. seats of vehicles,v

.view to preventing vedges of the cushion, these frames,

" n earner onrein..

OZELLO E. HUNT, OF CHICAS-0, ILLINOIS, ASSGNR 0F l-lELF T0 HARLES W.

SNELL COMPANY, F CHICAGO, ILLINOIS, A

CRPORTIOH 0i? XLLINUS.

SPRING srnuornnn.

Specication or Letters Yetcnt.

@reiterated Jon. le, i919.

Application led April 23, 1918. Serial eo. 2392.95.

To all whom t may concern:

Be it known that I, znLLo Pe HUNT.. a

citizen of the United States, residing at Chi- -provement in YSpring- Structures, of .which the following is n specification.

My invention relates, more particularly, to cushions` or the like, formed or" coiled springs grouped together to afford .to the cushion the desired cushioning effect, my imbeenv devised for use,

cushion structures, as, for

chairs and similar structures. Such structures are' generally provided with Wire frames which surround the springs with the undue segginor of the iowever, being so llocated and related to the springs thatthey present such a degree of stiliuess along the upper edge of the cushion as 'to produce discomfort to one using the cushion. y @ne of my objects is to provide improvements in cushion structures to the end that be obtained without the discomfort referred to, and without interference with the free functioning of the springs, and sagging of the, cushion structure be prevented. Other objects are to hold the springs in properly spaced relation, prevent the top of the cushion from caving in and hold the sides of the cushion egainst canting, thereby preserving an even upper surface to the cushion, preventing overlapping yof the springs, and therefore prevent noise, and holding thc springs against canting and overlapping in the assembling therewith of. the upholstery covering.

Referring to the accompanying drawings, Figure l is :i plan view ofa cushionstructure constructed in accordance with my invention, n portion of the spring-inclosing pockets being broken away to disclose interior details. F ig. 2 is a view in end elevation of the structure of Fig. l. Fig. 3 is a section taken at the line 3 3 on Fig. .l and viewed in the direction ,of the arrows; and Fig. el, a view in sectional elevation of the spring-inclosing pocket structure, the springs being omitted.

lnforming my improved structure, I

adjacent springs.

' against displacements tion of stretching thelupholstery covering group the coiled springs, which preferably are of the common hour-grass type, and are represented at 5, preferably into parallel series as shown, end connect them ltogether at the adjacent portions of their upper and lower terminal convoiuticns as shown at- 6 and 7, the connecting means 6 as shown being in the forni et' ony suitable clip and the connecting means as shown being merely cord tics. The particular connecting means employed, however, immaterial. The

group of springs thus provided is encircled by a traine 8, preferably of relatively heavy steel wire. This frame is positioned between .the upper volutions of the springs, preferably half way as shown, and ineens, shown et 9, conneet this traine et interi/'els with the relatively srnall intermediate convolutions of the The frame 8 is of Such Size the space within this freine is of larger dimensions than the outside dimensions of the group of' springs at their constricted portions, or, in other Words, at the portion or' the springs opposed by the frame, and in connecting the frame with the springs the means 9, :the intermediate portions of` all. oit-the springs at the margins of the group thereo'fore caused to be deflected outwardly/as represented in the drawings, thus placing them under tension so that the entire spring structure is placed under a latn eral tension radiating, so tospeak, from the center of the group of springs, with the ree sult that the spring structure is prevented from sagging, the springs are held in prop; orly spaced' relation, preventing overlapping of the springs and consequently preventing noise, and the upper surface of the cushion isfpreserved in even condition, all without presenting any'objectionable stiff lower terminal corrl ion.

Still another result of forming the spring structure es, stated is that the springs are held in the desired relative positions and over the spring structure.

In the drawings, I have shown the springs 5 as pocketed 1n casings, which is the preferred manner of forming the cushion, but

is not necessary to the employment of certain tentures of my invention. These casthereoil in the opera-A ings which are represented. at 10 and are 'formed of fabric are arranged in a parallel each containing a 'series o series as shown,

are preferably madecby the springs and placing .two sheets of any suitable fabric in superposed position and. sewing them along parallel lines continuously across the sheets to produce the parallel seams l1, thus forming parallel fompartments i2 open at their ends into which the series of springs clipped together at 6 are introduced6 the ends of the coni'parti'nents then being closed by overlapping' or gathering the `aloric. The adjacent springs of thereof are then connected togetherLas' by the (ord ties 7 whicli passthrough thefabcompartments.

While ll have illustrated and described a particular construction in which my invention is embodied, l do not wish to be understood as intending to limit the same may be variously modied and altered, Without departing from the spirit of my invention.l

adjacent series the springs adjacent it thereto, as

ageetece What@ claim as new and desire to Secure by Letters Patent is-a l l. ln a cushion structure, the combination cfa group of spiral springs connected togetlier, arelatively stift frame surrounding said group of springs and located intermediate the upper and lower edges thereof, and means connecting said frame with the convolutions of the springs adjacent thereto intermediate the ends ot the latter, the parts being so proportioned and arranged as to causeA the springs 'to he outwardly .dellectcd between their ends in the normal condition o the structure, thereby placing the springs under laterally-directed tension.

2. In a cushion structure, the combination of ,a group of spiral springs connected to gether' at the adjacent portions of adjacent terminal convolutions, a relatively stiff fra-me surrounding saidy group of springs and located intermediate the upper and' lower ends thereof, and means ,connecting the said frame with the convolutions vvor' thereto intermediate the ends of the latter, the parts being so proportioned and arranged as to cause the springs to be outwardly deflected between their 'ends in the normal condition of the f structure, thereby placing the springs under laterally-directed tension.

OZELLO R. HUNT. 

